The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 07, 2013
Filed:
May. 27, 2011
Daisuke Iwahashi, Nara, JP;
Masayoshi Tojima, Osaka, JP;
Tokuzo Kiyohara, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
In layout design step of the semiconductor integrated circuit manufacturing method, when it is found that the wiring length between an external terminal and an IO block (external terminal I/F circuit) corresponding to the external terminal increases after a floorplan of a circuit including a functional block and the IO block is determined, placement of the IO block is determined such that the IO block is placed close to the external terminal to alleviate constraints on the wiring between the IO block and the external terminal, and timing adjustment circuits whose number is determined according to the wiring length of a bus (or a shared bus) connecting a data transfer circuit and the IO block is inserted into the bus.